Combined sounding box and speaking unit



J ZITZERMAN COMBINED SOUNDING BOX AND, SPEAKING UNIT Aug. 24; 1926'.

Filed 001;. a 1925 INYENTOR Ziize ATTORNEYS Patented Aug. 24, 1926. v

UNITED STATES A- ins -m:

JACOB zrrznnm, or BROOKLYN, NEW YORK.

' comstcunn sounnme BOX AND ermine UNIT.

Application filed October a, 1925." seriai'xo. 60,843.

' This invention relates to sound-conveying and sound-reproducing devices and comprehends a combined sound box and speaking unit, by means of which sounds, may be reproduced from a record of a talking machine or conveyed by radio.

One of the outstanding objects of the pre ent invention resides in the provision of a member including a diaphragm and separate means for mechanically and electrically vibrating the diaphragm to reproduce or transmit sounds, thereby eliminating in accordance with the common practice, the

necessity of removing and replacing a talk-- ing machine sound boxwith a radio speaking unit when" it is desired to employ the amplifying chamber of the talking machine as a loud speaker for a radio.

The invention furthermore comprehends in a combined sound box and speaking unit including the diaphragm and separate means for mechanically and electrically actuating 1 the same, means for adjustin the electrical actuating means whereby to dispose the same in a retractive position out of the vibratory path of movement of the diaphragm when the same is mechanically actuated so as to prevent interference with the mechanical reproduction of sounds. a

The invention furthermore comprehends a combination sound box and speaking'unit equipped with detachablemeans for connecting the sound box with a radioreceiving set when the diaphragm of the sound box isto be mechanically vibrated by the needle and record.

The invention still further comprehends a combined sound box andspeaking unit of the character set forth which is comparat ively simple in its construction and mode of use, which is inexpensive to produce, and which is highly efiicient in its purpose.

With the above recited and other objects in view reference is had to the following specification and accompanying drawings in which there is exhibited one example or embodiment of the invention which is in no way intended as a limitation upon the sec -of the appended claims as it is to be clear y understood that variationsand modifications which properly fall within the scope of said claims may be resorted to when found expedient.

Figure 1 is a perspective view illustrating the combined sound box and speaking unit 'Fig. 2;

speaking unit includes a housing or casing arm leads to and communicates with the which the usualneedles are associated, which needles have co-operation with the 4 of the casin for effectin the adjustment of the base an "with the set.

in its applied relation to a talking machine I 1 1g. 2 s e side view of the same; 1* 1g. 3 1s a sectional view therethrough taken approximately on the line 3-3 of a co- 4 is a sectional view taken approxii F1 matel y on the line 4:4 of Fig. 3..

Referring to the drawings by characters I 1- of reference, the combined sound box and 10, which'is closed exce t for the sound out .let boss 11 which is designed to fit Upon and establish communication with the usual tone arm A of a talking machine B, which tone sound amplifying-chamber C. Arranged within the housing 10 is a ma netically sus- I. 1 ceptible dia hragm 12, to whic is connected in the usua manner, a needle bar 13-with j ooves of the record E'-ofa talking machme for mechamcally-vibrating the diaphragm to reproduce sounds. Arran' ed within the bedsing or casing 10 is an'e ectromagnet 14 carried by a base 15' mounted for movement on guide p ns 16 which extendthrough open-' lugs 17 in the base. The base 15 is ad ustableto advance the core 18 ofthe magnet toward or retract the samefrom the diaphragm 12 through the medium of an adustmg device 19 specifically illustrated by way of example, as a threaded shank swiv-. eled at 20 to the base and extending throu h a complementary threaded bearing 21 in t e provided ,at its outer end with a manipuatlng knob or head 22 disposed exteriorly I magnet. fhe base and outer side wall of the housing 10 are rovided with aimed apertures 23 and 24, an the base carries spaced contact elements 25 which extend beyond the aperture 23 for engagement 'with a jack 26 connected to a radio receiving set by means of a conductor 27 whereby the magnet electrically connected In use and operation, when the device is employed in its capacity as a sound box for 5 a ta1kingmachine,,-the knob 22 is mani ulated to retract the basef15,-wherebyto 's- 1 pose thecore 1830f the magnet-14 in a.p0Bition sufficiently spaced from the diaphragm to prevent any interference witlnthe vibration thereof by the needle D. \Vhen used in this capacity the jack is removed to d1sconnect the magnet from the radio set so that the conductor will not interfere withv the closing of the cover of the talking machine.

When used in the capacity of a speaking unit, the knob 22 is manipulated to advance the magnet core 18 to a position in close proximity to the diaphragm for causing the vibration thereof. \Vhen employed as a speaking unit, it is desired to exclude the air from the interior of the casing asmuch as possible,while when the device is used in the capacity of a sound box it is essential to permit of free circulation of air thereventin aphragm, a housing therefor, and mean; for

venting the housing when using theaaame in the capacity of a sound box and for closing the housing when using the same in the capacity of a speaking unit.

2. As a new article of. manufacture, a combined sound box and'speaking unit, ineluding a diaphragm, separate means for mechanically and magnetically actuating the diaphragm a housing therefor having apertures, and a shi'ftable closure for said venting apertures, whereby the housing may be vented when used as a sound box and closed when the same is employed susceptive diaphragm in said housing, a

needle bar connected with the diaphragm fer' mechanically vibrating the same, and electromagnetic means for magnetically actuating the same said housing having venting apertures open to the atmosphere when the same is mechanically operated, and a closure for said venting apertures for closing the housing when the same is magnetically operated.

4. A combined sound box and speaking unit, comprising a housing, a magnetically susceptive diaphragm in said housing, a needle bar connected with the diaphragm lor mechanicallyvibrating the same, and electromagnetic means for magnetically actuating the same, said electromagnetic means being adjustable toward vthe diaphra gm when the same is magnetically operated and adjustable away form the diaphragm when the same is mechanically operated.

5. As a new article of manufacture, a

combined sound box and speaking unit, in-

eluding a diaphragm and separate means for mechanically and electrically actuating the diaphragm, the means for electrically actuating the diaphragm being adjustable whereby to dispose the same in a position out of the vibratory path of movement of the diaphragm when mechanically actuated.

JACOB ZITZERMAN. 

